I am Arham Shah, currently in my third year (after second year when I did the internship). In my second year summers I interned at Indian Institute of Science (IISc) working on multiphase CFD research. This article gives an overview of how I got this internship and my experience during those two months.

About the Internship:

University: Indian Institute of Science (IISc)
Supervisor: Gaurav Tomar, Department of Mechanical Engineering
Duration: May 10 - July 5, 2025
Mode: On-site
Research Area: Multiphase CFD
Funding: No (unpaid internship)

How I Got the Opportunity:

I secured this opportunity through cold mailing professors. My application included:

• Resume
• Cover letter briefly describing my projects

I didn’t receive help from anyone during this process and managed the entire application independently.

Research Project:

Title: Research Intern For CFD in Multiphase Flow

The research topic was jointly discussed and decided between myself and Professor Tomar. I worked in the field of multiphase CFD and learned to use Basilisk, an open-source solver that specializes in:

• Adaptive grid refinement
• Surface tension dominant flows

Research Focus: My primary work involved studying binary droplet collisions in air and investigating the conditions that determine whether droplets will:

• Coalesce (merge together)
• Bounce off each other

I am continuing to work on different problems in this area even after the internship concluded.

Experience Highlights:

What I Loved:

• Bangalore weather and food were excellent
• Great atmosphere in the lab with a positive work culture
• Learned advanced CFD techniques using cutting-edge tools
• Hands-on experience with adaptive mesh refinement

Current Work: I’m continuing research on different problems in multiphase flow, building on the foundation established during the internship.

Overall Recommendation:

I would rate this experience an 8/10 and recommend both the professor and the research area to others interested in computational fluid dynamics and multiphase flows.

Contact Information:

• Email: 23b2335@iitb.ac.in